Filtering oil



UNITED STATES PATENT OFFICE.

THOMAS- GAUNT, OF PEORIA, ILLINOIS.

FILTERINGOIL.

SPECIFICATION forming part of Letters Patent No. 623,536, dated April25, 1899.

Application filed October 29,1896. Renewed August 2, 1898. Serial No.687,568. (No specimens.)

To all whom it may concern:

Be it known that I, THOMAS GAUNT, of Peoria Illinois, have inventedcertain new and useful Improvements in the Manufacture of Oil fromCereals. of which the following is a description.

My invention relates more particularly to.

the manufacture of corn-oil.

The object of the invention is to increase the clearness and brightnessof appearance of the oil by an improved process of filtration.

After the germs have been separated from the starch, feed, dzc, they areusually ground and the meal pressed in hydraulic presses to express theoil. The crude oil so formed may be purified and improved in appearanceby proper filtration, and the object of the present invention is toperfect the filtration process, so as to produce a clearer and purer oilthan has heretofore been obtainable in any commercial process offiltration with which I am acquainted and at the same time to accomplishthese improved results in a most economical manner.

I have used fullers earth, which I have up and introduced into the crudeoil before it is filtered it seems to take up almost all the dust, dirt,and other impurities and leave the filtered oil clean and brilliant. Foreach hundred gallons of crude oil I introduce about I ten pounds of theground oil-cake. filtration the residue is a dark dirty mass, owing tothe impurities which have been collected from the oil. The proportionsmay be widely varied, according to the purity desired and the relativevalue of oil and oil-cake,which may to some extent determine how much ofthe oil-cake it is desirable to utilize in this manner. In place of theground oil-cake I may use some of the germ-flour before oil is expressedfrom it, though I prefer to use the ground oil-cake, as described.

The oil produced by this improved process of filtration with groundoil-cake is a clearer and brighter oil than any I have yet seen whichhas not been subjected to laboratory treatment.

What I claim, and desire to secure by these Letters Patent of the UnitedStates, is as follows:

1. The improvement in the method of purifyin g corn and similar oils byfiltration, which consists in adding to the oil before filtering some ofthe finely-reduced solid portions of the material from which the oil isexpressed or filtered, substantially as set forth.

2. Improvement in the manufacture of corn and similar oils,whichconsists in first expressing the .oil from the germs, then regrindingsome of the oil-cake and adding it to the oil and then filtering theoil, substantially as set forth.

In testimony whereof I have hereunto set my hand.

THOMAS GAUNT.

Witnesses:

CARRIE M. GILL, JNo. L. FUELLING.

After the

